Unit 3.4 Energy Bar Charts Sasek Chemistry

Front

How many energy bars represent a gas?

Back

4 bars represent a gas in energy bar charts.

Front

How many energy bars do we use to represent a liquid?

Back

2 bars represent a liquid in energy bar charts.

Front

What does E_CH stand for?

Back

E_CH represents stored chemical energy inside of particles.

Front

Should E_CH be included in a chemical change process?

Back

No, E_CH should not be included in a chemical change process.

Front

What does an endothermic process mean?

Back

An endothermic process absorbs heat from the surroundings.

Front

What is the significance of a positive Q value in energy diagrams?

Back

A positive Q value indicates that energy is absorbed, typically during an endothermic process.

Front

What occurs during a phase change?

Back

During a phase change, a substance changes from one state of matter to another, such as solid to liquid.

Front

What is the heating curve?

Back

A heating curve is a graph that shows the temperature of a substance as it is heated over time.

Front

What happens at point D to point E on a heating curve?

Back

The process from point D to point E typically involves a phase change.

Front

What is the relationship between energy and temperature during a phase change?

Back

During a phase change, energy is added or removed without changing the temperature.